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• S~5 • <br />Project Name: Seneca II <br />Project Number. 882-1000 <br />Prepared ey: JPB <br />Date Prepared: OS Nov 1997 <br />File: J:\882\DS\S2SUMM.xLS <br />Channel Design Flow, O Slope Bottom Width (BW) Side Slopes Depth of Flow (D) Velocity Freeboard Total Depth Rlprap D50 <br />(c/s) (%) (tt) (H:1 V) (ft) (fps) (ft) (ft) (In) <br />(1) (2) and (3) (4) (5) (6) <br />S2 PM-5 2 3-25 <br />S2 PM-5 2 26-30 <br />0.3 5.94 0.3 0.6 <br />0.2 5.69 0.3 0.5 <br />Notes: <br />n~i 1) Channel designed for existing worst case, vegetated, V-shaped conditions. <br />~ 2) Channel was designed to safely convey runoff resulting from the 10 year, 24 hour storm event. <br />`" 3) Design flow rounded to nearest whole cfs from SEDCAD hydrologic analysis. <br />4) Depih of slow based on minimum grade. <br />5) Velocity based on maximum grade. <br />6) Riprap D50 = 3 inches represents typical gravel found on site. <br />x <br />m <br />c <br />~~ <br />N <br />N <br />d <br />O <br />N <br />O <br />m <br />m <br />Page 6 <br />